Graphical user interface for a display screen or a portion thereof



The movie images within the rectangles are subject to copyright protection. Such copyrights are the property of their respective owners.

The single FIGURE is a front view of a graphical user interface for a display screen or portion thereof showing our new design.

The broken line showing of the display screen or portion thereof in the FIGURE is not part of the claimed design. 

The ornamental design for a graphical user interface for a display screen or a portion thereof, as shown and described. 